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Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H2C2O3N5D9U8NI7S4P5F7B3W6I9K4Y9Si9Sg9Sg10Sg999Cn1000Ds61Uuo9 is 585210.6795 g/mol

Convert between H2C2O3N5D9U8NI7S4P5F7B3W6I9K4Y9Si9Sg9Sg10Sg999Cn1000Ds61Uuo9 weight and moles
CompoundMolesWeight, g
H2C2O3N5D9U8NI7S4P5F7B3W6I9K4Y9Si9Sg9Sg10Sg999Cn1000Ds61Uuo9

Elemental composition of H2C2O3N5D9U8NI7S4P5F7B3W6I9K4Y9Si9Sg9Sg10Sg999Cn1000Ds61Uuo9
ElementSymbolAtomic weightAtomsMass percent
HydrogenH1.0079420.0003
CarbonC12.010720.0041
OxygenO15.999430.0082
NitrogenN14.006760.0144
UraniumU238.0289180.3254
IodineI126.90447160.3470
SulfurS32.06540.0219
PhosphorusP30.97376250.0265
FluorineF18.998403270.0227
BoronB10.81130.0055
TungstenW183.8460.1885
PotassiumK39.098340.0267
YttriumY88.9058590.1367
SiliconSi28.085590.0432
SeaborgiumSg271.1335101847.1649
CoperniciumCn285.1741100048.7302
DarmstadtiumDs281.1621612.9307
OganessonUuo0.000000090.0000
HydrogenD2.014101777890.0031

Computing molar mass step by step

First, compute the number of each atom in H2C2O3N5D9U8NI7S4P5F7B3W6I9K4Y9Si9Sg9Sg10Sg999Cn1000Ds61Uuo9:
H: 2, C: 2, O: 3, N: 6, U: 8, I: 16, S: 4, P: 5, F: 7, B: 3, W: 6, K: 4, Y: 9, Si: 9, Sg: 1018, Cn: 1000, Ds: 61, Uuo: 9, D: 9

Then, lookup atomic weights for each element in periodic table:
H: 1.00794, C: 12.0107, O: 15.9994, N: 14.0067, U: 238.02891, I: 126.90447, S: 32.065, P: 30.973762, F: 18.9984032, B: 10.811, W: 183.84, K: 39.0983, Y: 88.90585, Si: 28.0855, Sg: 271.13347, Cn: 285.17411, Ds: 281.16206, Uuo: 0, D: 2.0141017778

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (H2C2O3N5D9U8NI7S4P5F7B3W6I9K4Y9Si9Sg9Sg10Sg999Cn1000Ds61Uuo9) = ∑ Counti * Weighti =
Count(H) * Weight(H) + Count(C) * Weight(C) + Count(O) * Weight(O) + Count(N) * Weight(N) + Count(U) * Weight(U) + Count(I) * Weight(I) + Count(S) * Weight(S) + Count(P) * Weight(P) + Count(F) * Weight(F) + Count(B) * Weight(B) + Count(W) * Weight(W) + Count(K) * Weight(K) + Count(Y) * Weight(Y) + Count(Si) * Weight(Si) + Count(Sg) * Weight(Sg) + Count(Cn) * Weight(Cn) + Count(Ds) * Weight(Ds) + Count(Uuo) * Weight(Uuo) + Count(D) * Weight(D) =
2 * 1.00794 + 2 * 12.0107 + 3 * 15.9994 + 6 * 14.0067 + 8 * 238.02891 + 16 * 126.90447 + 4 * 32.065 + 5 * 30.973762 + 7 * 18.9984032 + 3 * 10.811 + 6 * 183.84 + 4 * 39.0983 + 9 * 88.90585 + 9 * 28.0855 + 1018 * 271.13347 + 1000 * 285.17411 + 61 * 281.16206 + 9 * 0 + 9 * 2.0141017778 =
585210.6795 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is C2H2B3Cn1000Ds61F7D9I16K4N6O3P5S4Sg1018Si9U8Uuo9W6Y9

Computing molar mass (molar weight)

To calculate molar mass of a chemical compound enter its formula and click 'Compute'. In chemical formula you may use:
  • Any chemical element. Capitalize the first letter in chemical symbol and use lower case for the remaining letters: Ca, Fe, Mg, Mn, S, O, H, C, N, Na, K, Cl, Al.
  • Functional groups: D, T, Ph, Me, Et, Bu, AcAc, For, Tos, Bz, TMS, tBu, Bzl, Bn, Dmg
  • parenthesis () or brackets [].
  • Common compound names.
Examples of molar mass computations: NaCl, Ca(OH)2, K4[Fe(CN)6], CuSO4*5H2O, nitric acid, potassium permanganate, ethanol, fructose, caffeine, water.

Molar mass calculator also displays common compound name, Hill formula, elemental composition, mass percent composition, atomic percent compositions and allows to convert from weight to number of moles and vice versa.

Computing molecular weight (molecular mass)

To calculate molecular weight of a chemical compound enter it's formula, specify its isotope mass number after each element in square brackets.
Examples of molecular weight computations: C[14]O[16]2, S[34]O[16]2.

Definitions

  • Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
  • Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
  • Mole is a standard scientific unit for measuring large quantities of very small entities such as atoms and molecules. One mole contains exactly 6.022 ×1023 particles (Avogadro's number)

Steps to calculate molar mass

  1. Identify the compound: write down the chemical formula of the compound. For example, water is H2O, meaning it contains two hydrogen atoms and one oxygen atom.
  2. Find atomic masses: look up the atomic masses of each element present in the compound. The atomic mass is usually found on the periodic table and is given in atomic mass units (amu).
  3. Calculate molar mass of each element: multiply the atomic mass of each element by the number of atoms of that element in the compound.
  4. Add them together: add the results from step 3 to get the total molar mass of the compound.

Example: calculating molar mass

Let's calculate the molar mass of carbon dioxide (CO2):

  • Carbon (C) has an atomic mass of about 12.01 amu.
  • Oxygen (O) has an atomic mass of about 16.00 amu.
  • CO2 has one carbon atom and two oxygen atoms.
  • The molar mass of carbon dioxide is 12.01 + (2 × 16.00) = 44.01 g/mol.

Lesson on computing molar mass

Weights of atoms and isotopes are from NIST article.

Related: Molecular weights of amino acids

molecular weights calculated today
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